Presumably one needs to have the application on a large number of devices in a region to work reliably using Bluetooth. 1% might be too low.
So, the TLAs / shady outfits would need to get this preinstalled on phones or bundled in as e.g. an os feature for those in the region, or make it a requirement for progressing past the checkpoint.
For example, install this application if you want to be allowed to leave your home. They have something like that in China.